用SMAC方法对二维非定常流动的数值模拟

使用ＳＭＡＣ算法，从非定常的Ｎ－Ｓ方程出发，对二维非定常流场进行数值模拟。并在非交错网格上，针对其压力算法的不足，通过求解压力Ｐｉｏｉｓｓｏｎ方程来求解压力。计算与实验的结果比较，显示了本文的算法较好地模拟了二维低Ｒｅ圆柱与方形钝体的绕流。

The numerical simulation of two-dimensional unsteady flow by SMAC

The modified SMAC method is constructed based on CFD. It is also discussed and Applied to simulate two dimensional viscous unsteady incompressible flows. The SMAC methodFor complex flows with non-staggered grids arrangement, which is on the basis of the unsteady N-S equations, is constructed by introducing a vorticity preserving auxiliary potenial functiona and Momentum interpolation scheme. For pressure calculation, some modification is proposed.Pressure compatiblity is ensured with non-staggered grids by special of pressure PoissonEquation and boundary conditions. The two classic examples of unsteady flow, namely the flowOuer the square cylinder and the circular cylinder, which both have periodic result, are simulated.